CGDI prog MB program Benz GL450 smart key

This article is to share my experience with using CGDI prog MB to program new key to Benz GL450.

Here you go!

Firstly, I connect cgdi mb to my GL450 via OBD, and connect cgdi mb to PC by usb.


My car is one-click start, it cannot program new key. So I take out the one-click start button and insert the smart car key.



When I open CGMB software, it prompts “Error downloading update profile, please check network connection”.


I try to connect by my smart phone spot.

Good! The network is connected successfully.


Now I start to program my car key.

The detailed operation steps as below

Step 1: Collect EIS Data

Step 2: Calculate password

Step 3: Generate key

Step 4: Write new key

Step 5: Test new key

In detail…

Step 1: Collect EIS Data

Insert the original gl450 car key to CGDI MB device to read key info

Return to CGDI MB software

Select “Read/ Write Key”-> “Infrared”-> “Read Key/ Chip”

It shows this key is on position 3, no used!


At this time, need to read EIS data to confirm whether the original can match or not.

Select “EIS”–>”Read EIS Data” to display key info


The key can program new key.

Click “Compute Password”–>”Copy key with key” –> “Collect Data”

Follow the prompt to select other key mode, and then click “OK”


Insert the original key into EIS and click “OK”


Note: Insert the key, no need to twist it

Then insert the original key into CGDI MB device, and click “OK”

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It will take about 3 minutes to collect data

EIS data is collected successfully

Insert the original key into EIS again and click “OK”

Wait for 10s, and take out the key

Insert the original car key into EIS again

Take out the key for 5s, and insert into EIS again

Insert the original key into CGDI MB coil again

Click “OK” to collect data

Collecting data is complete and save data to desktop

Save file successfully


Click “Upload Data” and open the file saved just now to upload


Upload the data successfully

Step 2: Calculate password

Click “Query Result” to calculate password

This procedure needs about 2 minutes

Computing success

Copy the password calculated to desktop to backup


Click “EIS”-> Paste the password-> “Save EIS Data”


Step 3: Generate key

Select “Generate EE”-> Remove the tick mark of key 3

Click “Load EIS file” to check EIS data information


The EIS file includes SSID, key password and VIN

Confirm the key password is correct

Click “Generate key file”

It takes 1 minute to generate

Save the file to desktop

Generate successfully


Step 4: Write new key

Put the new key into cgdi rog mb to read info

Select “Read/ Write Key”-> “Infrared”-> “Read Key/ Chip”

It shows this new is not used

Click “Reset” to erase the key data

Note: Regardless of the key is used or not, please remember to erase the data, otherwise will be failed to write

Reset operation succeed


Click “Open/Write” button

Note: Smart key please choose 41 format, common key and BE key please choose 51 format! When writing the original key, please make sure that it is wiped by the CGMB, otherwise the write will fail!


Choose one key unused file to write

Write success


Click “Read key/ chip” to confirm whether the key is written successfully or not

Step 5: Test new key

Finish all the steps above. The last step is to test the new key.

Insert the new key into EIS to learn automatically

Light up the instrument- OK


Remote the window- OK


Turn on ignition switch- OK


CGDI prog MB program Benz GL450 smart key successfully

Hope can help you out! Enjoy!